Headphone assembly



FIG. 1 is a front perspective view of a headphone assembly according to our design shown in a first configuration thereof;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top elevation view thereof;

FIG. 7 is a bottom elevation view thereof;

FIG. 8 is a rear perspective view of the headphone assembly of FIG. 1, shown in a second configuration thereof;

FIG. 9 is a front elevation view thereof;

FIG. 10 is a back elevation view thereof;

FIG. 11 is a right side elevation view thereof;

FIG. 12 is a left side elevation view thereof;

FIG. 13 is a top elevation view thereof; and,

FIG. 14 is a bottom elevation view thereof.

Broken lines are environmental only and form no part of the claimed design. 

CLAIM The ornamental design for a headphone assembly, as shown and described. 